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why does instanceof return false for some literals


why does instanceof return false for some literals  using -'javascript,literals,instanceof'

"foo" instanceof String //=> false
"foo" instanceof Object //=> false
true instanceof Boolean //=> false
true instanceof Object //=> false
false instanceof Boolean //=> false
false instanceof Object //=> false

// the tests against Object really don't make sense


Array literals and Object literals match...

[0,1] instanceof Array //=> true
{0:1} instanceof Object //=> true


Why don't all of them? Or, why don't none of them?
And, what are they an instance of, then? Nothing()?

It's the same in FF3, IE7, Opera, and Chrome. So, at least it's consistent. ;)



Missed a few. ;)

12.21 instanceof Number //=> false
/foo/ instanceof RegExp //=> true

    

asked Sep 16, 2015 by akhilesh
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